Well id imagine that they probably had a stand set up with gta 4 to get some people to buy it thinking they would want to play it first or replay it for posterity. Then the customer might have walked in, scanned the display and just assumed it was the right game since honestly most gta do look similar.

To be fair, we find a joy in ******* retarded people who can't be bothered to read. In fact the best part of our day is making ass hole customers look like idiots all while still doing our job. Did I mention I hate customers?